.button {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 16px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 23px;
    margin: 4px 2px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    cursor: pointer;
}
.button_small {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 2px 2px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    cursor: pointer;
}
.button_middle {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 5px 5px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 20px;
    margin: 3px 3px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    cursor: pointer;
}
.button1:hover {
	opacity:1;
    background-color: white; 
    color: black; 
    border: 2px solid #4CAF50;
}
.button1 {
    opacity:0.7;
    background-color: #4CAF50;
    color: white;
}
.button2:hover {
    background-color: white; 
    color: black; 
    border: 2px solid #008CBA;
}
.button2 {
    background-color: #008CBA;
    color: white;
}
.button3:hover {
    background-color: white; 
    color: black; 
    border: 2px solid #f44336;
}
.button3 {
    background-color: #f44336;
    color: white;
}
.button4:hover {
    background-color: white;
    color: black;
    border: 2px solid #e7e7e7;
}
.button4 {
	background-color: #e7e7e7;
}
.button5:hover {
    background-color: white;
    color: black;
    border: 2px solid #555555;
}
.button5 {
    background-color: #555555;
    color: white;
}
